.mask{
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  z-index: 100;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, .1);
}
/* 弹幕面板 */
.barrageBox{
  display: flex;
  flex-direction: column;
  align-content: center;
  height: 300px;
  width: 500px;
  background-color: rgb(255, 253, 253);
  border-radius: 10px;
  padding: 10px;
  box-shadow: rgb(243 232 232) -2px 2px 20px 0px;
  flex-wrap: nowrap;
  justify-content: space-evenly;
  align-items: center;
}
/* 弹幕面板下每一行 */
.row{
  width: 80%;
}
/* 输入框 */
.row > .barrageIpt{
  height: 50px;
  border: 0;
  outline: none;
  border-radius: 50px;
  background-color: rgb(240, 240, 240);
  font-size: 20px;
  text-indent: 2em;
  width: 100%;
}
/* 发射按钮 */
.row > .barrageBiu {
  height: 20px;
}